fix image registry in ClusterExtension #3432

Job	Run time
changed-files	10s
lint	2m 49s
unit_tests_ui	0s
build-shell-ui	0s
unit_tests_shell_ui	0s
build-docs	0s
build_integration_container_nginx	0s
unit_tests_crd_client_generator	0s
unit_tests_lib_alert_tree	0s
unit_tests_metalk8s_operator	0s
unit_tests_salt	59s
unit_tests_storage_operator	0s
build / build	17m 29s
integration_tests_ui	0s
build / build-docs / docs	1m 49s
build / build-shell-ui / shell-ui	57s
build / write-final-status	7s
e2e-tests / single-node-e2e / single-node	1h 34m 25s
e2e-tests / multi-node-e2e / multi-node	1h 48m 36s
e2e-tests / single-node-e2e / destroy-single-node-cluster	2m 48s
e2e-tests / multi-node-e2e / destroy-multi-node-cluster	3m 9s
write-final-status	11s
	3h 53m 29s

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